Multi-step reaction with 4 steps
1.1: caesium carbonate / N,N-dimethyl-formamide / 3 h / 20 °C
2.1: n-butyllithium / hexane; diethyl ether / 0.5 h / -78 °C / Inert atmosphere
2.2: 3 h / -78 - 20 °C / Inert atmosphere
3.1: ammonium hydroxide; copper(ll) sulfate pentahydrate / 17 h / 140 °C / Sealed tube
4.1: triethylamine; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide / tetrahydrofuran; ethyl acetate / 16 h / 20 °C
With
ammonium hydroxide; n-butyllithium; copper(ll) sulfate pentahydrate; caesium carbonate; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine;
In
tetrahydrofuran; diethyl ether; hexane; ethyl acetate; N,N-dimethyl-formamide;